Upset Brief · TX-37 · Lauren Peña (R) vs. Greg Casar (D), incumbent
A long shot on the math: it takes a 58.9-point national wave.
0%
odds today
0%
odds with the plan
162,220
net votes to find
Greg Casar won
result of the November 3, 2026 election
Where
- 01+132Precinct 201 (Travis County)Starting line Casar +33. 9.7% split their ticket.
- 02+101Precinct 232 (Travis County)Starting line Casar +43. 7.3% split their ticket.
- 03+91Precinct 235 (Travis County)Starting line Casar +40. 6.6% split their ticket.
- 04+86Precinct 236 (Travis County)Starting line Casar +44. 6.4% split their ticket.
- 05+84Precinct 233 (Travis County)Starting line Casar +41. 6.0% split their ticket.
- 06+68Precinct 205 (Travis County)Starting line Casar +65. 4.9% split their ticket.
The top 12 precincts carry 17% of the plan.
How
- P+4,679Persuade4,679 voters who split their ticket in recent elections and lean Casar today.
- M+0MobilizeFew precincts give Peña's side 55 percent or more, so turnout is a small lever here; the plan leans on persuasion instead.
- C+482ConsolidateVoters who went third party in recent races, in the closest places on the map.
Plus a national shift of 58.9 points of margin (157,058 votes) that no campaign controls.
What has to be true
- Peña wins 50 percent of the ticket splitters now leaning Casar.
- It would take a national shift of about 58.9 points toward Peña's side, larger than any midterm swing in recent memory.
- No 2026 public poll exists for this race, so the starting line is a weighted blend of official recent results; the first real poll will move it.
The numbers behind it
- 01Crossover regression178 precincts, R² 0.964, 31 crossover precincts identified
- 02Monte Carlo20,000 seeded simulated elections with a 7-point baseline error. 90% range of the final margin with the plan: -188,407 to -126,225 votes.
- 03Money, FEC candidate totals through June 30Peña $770 cash on hand; Casar $597,005.
- 04Call program for this list7,408 households, 22,224 dials, about 1,165 live conversations: an estimated $3,858 at published rates.
Independent analysis by The Political Group from official Texas Secretary of State precinct returns (2022 and 2024), FEC filings and published polls, as of September 26, 2026. Not affiliated with any candidate or party.